<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>forEachRight</title>
</head>

<body>
    <div>打开浏览器控制台查看结果</div>
    <script>
        const forEachRight = (arr, callback) => arr.slice().reverse().forEach(callback);
        forEachRight([1, 2, 3, 4], val => console.log(val)); // '4', '3', '2', '1'
    </script>
</body>

</html>